$ git clone -n https://src.fedoraproject.org/rpms/slang.git /var/lib/mock/f41-build-814526-14252/root/chroot_tmpdir/scmroot/slang
Cloning into '/var/lib/mock/f41-build-814526-14252/root/chroot_tmpdir/scmroot/slang'...
$ git fetch origin 3506e2d21371a5306e2cfc35db582a9276d8d032:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slang
 * [new ref]         3506e2d21371a5306e2cfc35db582a9276d8d032 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3506e2d Eliminate use of obsolete %patchN syntax (#2283636)