$ git clone -n https://src.fedoraproject.org/rpms/perl-Lingua-Stem-It.git /var/lib/mock/f45-build-24433-603/root/chroot_tmpdir/scmroot/perl-Lingua-Stem-It
Cloning into '/var/lib/mock/f45-build-24433-603/root/chroot_tmpdir/scmroot/perl-Lingua-Stem-It'...
$ git fetch origin ef418fb0f0e7637242c7badba411b176ad583f98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Lingua-Stem-It
 * [new ref]         ef418fb0f0e7637242c7badba411b176ad583f98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef418fb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild