$ git clone -n https://src.fedoraproject.org/rpms/mod_perl.git /var/lib/mock/f41-build-829746-156190/root/chroot_tmpdir/scmroot/mod_perl
Cloning into '/var/lib/mock/f41-build-829746-156190/root/chroot_tmpdir/scmroot/mod_perl'...
$ git fetch origin 423ed7753103da70ae7dc821d66ea98fe169fcf6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mod_perl
 * [new ref]         423ed7753103da70ae7dc821d66ea98fe169fcf6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 423ed77 Add lmdb and openldap devel buildrequires, fixes RHBZ#2302876