$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-MockModule.git /var/lib/mock/f45-build-26741-619/root/chroot_tmpdir/scmroot/perl-Test-MockModule
Cloning into '/var/lib/mock/f45-build-26741-619/root/chroot_tmpdir/scmroot/perl-Test-MockModule'...
$ git fetch origin d467729f8c1e02ed19a7122f05fe89c20035a5df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-MockModule
 * [new ref]         d467729f8c1e02ed19a7122f05fe89c20035a5df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d467729 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild