$ git clone -n https://src.fedoraproject.org/rpms/rust-coolor.git /var/lib/mock/f40-build-1834184-24945/root/chroot_tmpdir/scmroot/rust-coolor
Cloning into '/var/lib/mock/f40-build-1834184-24945/root/chroot_tmpdir/scmroot/rust-coolor'...
$ git fetch origin c3cc0bab97f05f4d8379d6869a3418ca492c1b55:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-coolor
 * [new ref]         c3cc0bab97f05f4d8379d6869a3418ca492c1b55 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3cc0ba Update to version 0.9.0; Fixes RHBZ#2232397