$ git clone -n https://src.fedoraproject.org/rpms/plasma-welcome.git /var/lib/mock/f41-build-847818-164127/root/chroot_tmpdir/scmroot/plasma-welcome
Cloning into '/var/lib/mock/f41-build-847818-164127/root/chroot_tmpdir/scmroot/plasma-welcome'...
$ git fetch origin f1c91398877f11ead86f9235452b1c2599276f2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-welcome
 * [new ref]         f1c91398877f11ead86f9235452b1c2599276f2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1c9139 6.1.5