$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Prereq.git /var/lib/mock/f45-build-26815-619/root/chroot_tmpdir/scmroot/perl-Test-Prereq
Cloning into '/var/lib/mock/f45-build-26815-619/root/chroot_tmpdir/scmroot/perl-Test-Prereq'...
$ git fetch origin eaa43747a6207a8b614abd5790b217ec2eedc89e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Prereq
 * [new ref]         eaa43747a6207a8b614abd5790b217ec2eedc89e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eaa4374 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild