$ git clone -n https://src.fedoraproject.org/rpms/perl-true.git /var/lib/mock/f45-build-27858-626/root/chroot_tmpdir/scmroot/perl-true
Cloning into '/var/lib/mock/f45-build-27858-626/root/chroot_tmpdir/scmroot/perl-true'...
$ git fetch origin a2885184375d9f14645fa31f13319812bb54cf0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-true
 * [new ref]         a2885184375d9f14645fa31f13319812bb54cf0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a288518 Perl 5.44 rebuild