$ git clone -n https://src.fedoraproject.org/rpms/arm-none-eabi-binutils-cs.git /var/lib/mock/f40-build-2054591-49105/root/chroot_tmpdir/scmroot/arm-none-eabi-binutils-cs
Cloning into '/var/lib/mock/f40-build-2054591-49105/root/chroot_tmpdir/scmroot/arm-none-eabi-binutils-cs'...
$ git fetch origin 68932905018914f4e4f7748df54f638e29e340c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arm-none-eabi-binutils-cs
 * [new ref]         68932905018914f4e4f7748df54f638e29e340c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6893290 updated to 2.41