$ git clone -n https://src.fedoraproject.org/rpms/perl-Glib-Object-Introspection.git /var/lib/mock/f40-build-778017-129727/root/chroot_tmpdir/scmroot/perl-Glib-Object-Introspection
Cloning into '/var/lib/mock/f40-build-778017-129727/root/chroot_tmpdir/scmroot/perl-Glib-Object-Introspection'...
$ git fetch origin 1565e3f1eb20b3cce25a36478fd2d0310cf238ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Glib-Object-Introspection
 * [new ref]         1565e3f1eb20b3cce25a36478fd2d0310cf238ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1565e3f Update perl-Glib-Object-Introspection to 0.051 (#2235533)