$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Number-Delta.git /var/lib/mock/f45-build-26756-619/root/chroot_tmpdir/scmroot/perl-Test-Number-Delta
Cloning into '/var/lib/mock/f45-build-26756-619/root/chroot_tmpdir/scmroot/perl-Test-Number-Delta'...
$ git fetch origin 5b41d94d9125f7fb84036455b62434bedf4a41a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Number-Delta
 * [new ref]         5b41d94d9125f7fb84036455b62434bedf4a41a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b41d94 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild