$ git clone -n https://src.fedoraproject.org/rpms/xfce4-mailwatch-plugin.git /var/lib/mock/f45-build-38788-728/root/chroot_tmpdir/scmroot/xfce4-mailwatch-plugin
Cloning into '/var/lib/mock/f45-build-38788-728/root/chroot_tmpdir/scmroot/xfce4-mailwatch-plugin'...
$ git fetch origin 1102174ab746b43deab0795cc43d9c37062b1ec6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-mailwatch-plugin
 * [new ref]         1102174ab746b43deab0795cc43d9c37062b1ec6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1102174 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild