$ git clone -n https://src.fedoraproject.org/rpms/perl-Env-Sanctify.git /var/lib/mock/f45-build-23403-597/root/chroot_tmpdir/scmroot/perl-Env-Sanctify
Cloning into '/var/lib/mock/f45-build-23403-597/root/chroot_tmpdir/scmroot/perl-Env-Sanctify'...
$ git fetch origin 6dff57838c564fed7b3888cce771bfcbe7e98dfd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Env-Sanctify
 * [new ref]         6dff57838c564fed7b3888cce771bfcbe7e98dfd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6dff578 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild