$ git clone -n https://src.fedoraproject.org/rpms/priv_wrapper.git /var/lib/mock/f45-build-28937-634/root/chroot_tmpdir/scmroot/priv_wrapper
Cloning into '/var/lib/mock/f45-build-28937-634/root/chroot_tmpdir/scmroot/priv_wrapper'...
$ git fetch origin 3ab904fc582d6d6165f736c937cd20a49462d1bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/priv_wrapper
 * [new ref]         3ab904fc582d6d6165f736c937cd20a49462d1bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ab904f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild