$ git clone -n https://src.fedoraproject.org/rpms/sysprof.git /var/lib/mock/f42-build-side-1-3500498-45970/root/chroot_tmpdir/scmroot/sysprof
Cloning into '/var/lib/mock/f42-build-side-1-3500498-45970/root/chroot_tmpdir/scmroot/sysprof'...
$ git fetch origin 01e00dea1fee07cbaa1c87ef46403b42957c7778:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sysprof
 * [new ref]         01e00dea1fee07cbaa1c87ef46403b42957c7778 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01e00de Update to 48.0