$ git clone -n https://src.fedoraproject.org/rpms/perl-String-MkPasswd.git /var/lib/mock/f45-build-26288-616/root/chroot_tmpdir/scmroot/perl-String-MkPasswd
Cloning into '/var/lib/mock/f45-build-26288-616/root/chroot_tmpdir/scmroot/perl-String-MkPasswd'...
$ git fetch origin 8a51558bf380e01ecb52d99c0ad2103416d4e332:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-String-MkPasswd
 * [new ref]         8a51558bf380e01ecb52d99c0ad2103416d4e332 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a51558 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild