$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Module-Used.git /var/lib/mock/f45-build-26776-619/root/chroot_tmpdir/scmroot/perl-Test-Module-Used
Cloning into '/var/lib/mock/f45-build-26776-619/root/chroot_tmpdir/scmroot/perl-Test-Module-Used'...
$ git fetch origin 42e5834a0821720c5f0e556a828ac420112acb66:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Module-Used
 * [new ref]         42e5834a0821720c5f0e556a828ac420112acb66 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42e5834 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild