$ git clone -n https://src.fedoraproject.org/rpms/perl-URI-FromHash.git /var/lib/mock/f45-build-27298-622/root/chroot_tmpdir/scmroot/perl-URI-FromHash
Cloning into '/var/lib/mock/f45-build-27298-622/root/chroot_tmpdir/scmroot/perl-URI-FromHash'...
$ git fetch origin b347aff1f7178939f9430fb945ba62f4843afdb0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-URI-FromHash
 * [new ref]         b347aff1f7178939f9430fb945ba62f4843afdb0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b347aff Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild