$ git clone -n https://src.fedoraproject.org/rpms/perl-Lingua-Stem.git /var/lib/mock/f45-build-24442-603/root/chroot_tmpdir/scmroot/perl-Lingua-Stem
Cloning into '/var/lib/mock/f45-build-24442-603/root/chroot_tmpdir/scmroot/perl-Lingua-Stem'...
$ git fetch origin fbe592535ea6a6bee373ff80cbd1f2cebbe4da11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Lingua-Stem
 * [new ref]         fbe592535ea6a6bee373ff80cbd1f2cebbe4da11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbe5925 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild