$ git clone -n https://src.fedoraproject.org/rpms/perl-PkgConfig-LibPkgConf.git /var/lib/mock/f41-build-816005-149918/root/chroot_tmpdir/scmroot/perl-PkgConfig-LibPkgConf
Cloning into '/var/lib/mock/f41-build-816005-149918/root/chroot_tmpdir/scmroot/perl-PkgConfig-LibPkgConf'...
$ git fetch origin e141d0b791405f0855c2a39e18fa8752f858873f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PkgConfig-LibPkgConf
 * [new ref]         e141d0b791405f0855c2a39e18fa8752f858873f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e141d0b Perl 5.40 rebuild