$ git clone -n https://src.fedoraproject.org/rpms/sfp-master.git /var/lib/mock/f45-build-35844-699/root/chroot_tmpdir/scmroot/sfp-master
Cloning into '/var/lib/mock/f45-build-35844-699/root/chroot_tmpdir/scmroot/sfp-master'...
$ git fetch origin 9c51e1a88073ea34924592208a463d4e7ae3fd23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sfp-master
 * [new ref]         9c51e1a88073ea34924592208a463d4e7ae3fd23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c51e1a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild