$ git clone -n https://src.fedoraproject.org/rpms/xscorch.git /var/lib/mock/f41-build-874477-16213/root/chroot_tmpdir/scmroot/xscorch
Cloning into '/var/lib/mock/f41-build-874477-16213/root/chroot_tmpdir/scmroot/xscorch'...
$ git fetch origin 7055b6afeac9d858532396070e2646ac27fdcb19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xscorch
 * [new ref]         7055b6afeac9d858532396070e2646ac27fdcb19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7055b6a Eliminate use of obsolete %patchN syntax (#2283636)