$ git clone -n https://src.fedoraproject.org/rpms/perl-Package-Stash.git /var/lib/mock/f45-build-25610-612/root/chroot_tmpdir/scmroot/perl-Package-Stash
Cloning into '/var/lib/mock/f45-build-25610-612/root/chroot_tmpdir/scmroot/perl-Package-Stash'...
$ git fetch origin 8a720a974e5cd5049053474d667a0c82fbbd8915:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Package-Stash
 * [new ref]         8a720a974e5cd5049053474d667a0c82fbbd8915 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a720a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild