$ git clone -n https://src.fedoraproject.org/rpms/perl-Object-HashBase.git /var/lib/mock/f45-build-25454-611/root/chroot_tmpdir/scmroot/perl-Object-HashBase
Cloning into '/var/lib/mock/f45-build-25454-611/root/chroot_tmpdir/scmroot/perl-Object-HashBase'...
$ git fetch origin fca2d731b5e537cbe81e710dbc8f4162dd370bfa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Object-HashBase
 * [new ref]         fca2d731b5e537cbe81e710dbc8f4162dd370bfa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fca2d73 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild