$ git clone -n https://src.fedoraproject.org/rpms/kcalc.git /var/lib/mock/f42-build-side-1-3502886-45979/root/chroot_tmpdir/scmroot/kcalc
Cloning into '/var/lib/mock/f42-build-side-1-3502886-45979/root/chroot_tmpdir/scmroot/kcalc'...
$ git fetch origin 895b4b62190be219391f16c5af587da50b6aa042:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcalc
 * [new ref]         895b4b62190be219391f16c5af587da50b6aa042 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 895b4b6 25.04.0