$ git clone -n https://src.fedoraproject.org/rpms/sbsigntools.git /var/lib/mock/f45-build-35654-698/root/chroot_tmpdir/scmroot/sbsigntools
Cloning into '/var/lib/mock/f45-build-35654-698/root/chroot_tmpdir/scmroot/sbsigntools'...
$ git fetch origin 93eac88cc1dbcbeda5d9d2fe18ecee6937915b7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sbsigntools
 * [new ref]         93eac88cc1dbcbeda5d9d2fe18ecee6937915b7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93eac88 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild