$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-MockObject.git /var/lib/mock/f45-build-26732-619/root/chroot_tmpdir/scmroot/perl-Test-MockObject
Cloning into '/var/lib/mock/f45-build-26732-619/root/chroot_tmpdir/scmroot/perl-Test-MockObject'...
$ git fetch origin e37c74e21f28277285648af3327d149176714ddd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-MockObject
 * [new ref]         e37c74e21f28277285648af3327d149176714ddd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e37c74e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild