$ git clone -n https://src.fedoraproject.org/rpms/sciplot.git /var/lib/mock/f39-build-2181813-51220/root/chroot_tmpdir/scmroot/sciplot
Cloning into '/var/lib/mock/f39-build-2181813-51220/root/chroot_tmpdir/scmroot/sciplot'...
$ git fetch origin 591f252ae8954fb331c128abc6bf0769bb39a220:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sciplot
 * [new ref]         591f252ae8954fb331c128abc6bf0769bb39a220 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 591f252 Initial import; Fixes: RHBZ#2245723